size2 -- number of binary digits to the left of the point

• Usage:

  size2 x

• Inputs:
  • x, a number
• Outputs:
  • the smallest number n such that 2^n is strictly greater than the absolute value of x

i1 : size2 4

o1 = 3

i2 : size2 3

o2 = 2

i3 : size2 4.

o3 = 3

i4 : size2 3.99999999

o4 = 2

i5 : size2 0

o5 = -1073741824

i6 : size2 0.

o6 = -1073741824

i7 : size2 (1/0.)

o7 = 1073741823

i8 : size2 (1/0.-1/0.)

o8 = 1073741823